大学英语（1）第二次网络作业3

二．介词填空： （按课本课文内容填入适当的介词）
11．If you don’t, you could end ____ spending hundreds of dollars more than you should have.
12. As activities are usually carried _____ during one’s spare time, leisure has the following functions: relaxation, recreation and entertainment, and personal development.
13. You should start packing ____least a week in advance.
14. Because you don’t want to stay _____ all night packing and wear yourself out before you even leave for the trip.
15. Moreover, you should also find ____ the best time of year to go.

请会答的帮帮忙，谢谢！

11. up
12. out
13. at
14. up
15. out

怎么有重复的选项 d/j e f a b g i h g c